Quiz At Home

Title: Find the roots of the quadratic equation

Grade: 9-a Lesson: S1-L7

Explanation: Hello Students, time to practice and review. Let us take next 10-15 minutes to solve the five problems using the Quiz Sheet. Then submit the quiz to get the score. This is a good exercise to check your understanding of the concepts.

Quiz: at Home

Problem Id Question Problem Options

1

Find the roots of the quadratic equation

\$ (4x)(x+1) = 9 \$

A) \$ (1+\sqrt5)/2,(1-\sqrt5)/2 \$

B) \$ (-1+\sqrt2)/2,(-1-\sqrt2)/2 \$

C) \$ 2,-1 \$

D) \$ (-1+\sqrt10)/2,(-1-\sqrt10)/2 \$

2

Find the roots of the quadratic equation

\$ -3x(x-3) = -15 \$

A) \$ (3 + \sqrt (29))/2 , (3 - \sqrt (29))/2 \$

B) \$ (-3 + \sqrt (29))/2 , (3 - \sqrt (29))/2 \$

C) \$ (3 + \sqrt (29))/2 , (-3 - \sqrt (29))/2 \$

D) \$ (-3 + \sqrt (29))/2 , (-3 - \sqrt (29))/2 \$

3

Find the roots of the quadratic equation

\$ 5x(-x + 1) = 2 \$

A) \$ (-5 + i\sqrt (15))/10 , (5 - i\sqrt (15))/10 \$

B) \$ (5 + i\sqrt (15))/10 , (5 - i\sqrt (15))/10 \$

C) \$ (5 + i\sqrt (15))/10 , (-5 - i\sqrt (15))/10 \$

D) \$ (-5 + i\sqrt (15))/10 , (-5 - i\sqrt (15))/10 \$

4

Find the roots of the quadratic equation

\$ -4x(-2x-3) = - 7 \$

A) \$ (3 + i\sqrt (5))/4 , (-3 - i\sqrt (5))/4 \$

B) \$ (-3 + i\sqrt (5))/4 , (3 - i\sqrt (5))/4 \$

C) \$ (-3 + i\sqrt (5))/4 , (-3 - i\sqrt (5))/4 \$

D) \$ (3 + i\sqrt (5))/4 , (3 - i\sqrt (5))/4 \$

5

Find the roots of the quadratic equation

\$ x(-2+x) = 1 \$

A) \$ 1 + \sqrt2 ,1 - \sqrt2 \$

B) \$ -1 + \sqrt2 ,1 - \sqrt2 \$

C) \$ 1 + \sqrt2 , -1 - \sqrt2 \$

D) \$ -1 + \sqrt2 ,-1 - \sqrt2 \$


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